Which of the following is least suited to providing clear evidence about a causal relationship between the independent and depen
dent variables? a. classical experimental design
b. Solomon four-group design post
c. test-only group design
d. one-shot case study
e. all of four choices are equally effective in providing evidence of a causal relationship
One shot case is less ideal because it <em>focuses on a single group being examined on a single occasion after an occurrence, procedure or intervention has been undergone.</em>
Since there is no control group for reference, it is a poor design; any observed changes are only believed to have been triggered by the incident.
